Does facial steam open pores?

Pores do not open and close like doors. Warmth may soften surface debris, but steam is not necessary for effective cleansing. For congestion, I would rather choose an appropriate cleansing or exfoliation strategy than depend on heat to 'open' the pores.

Pores do not open and close like doors

Heat can make flushing and discomfort worse, especially on reactive skin. A gentle cleanse with lukewarm water is a better starting point than trying to steam congestion out.